I had a Nellis Cab driver demand an additional $1 tip, as in "... I don't have enough change, so I'll just give you back $9 instead of the $10". She was upset that the trip was so short and that I would not allow her to long haul me. I filed a report on this matter.

After talking to friends who were also in Vegas at the same time, 80% of them said were long hauled and tunneled from the airport.